:root{--ink:#111416;--muted:#58656b;--line:#dfe4e6;--rail:#f5f7f7;--focus:#08749a;--serif:"Iowan Old Style","Songti SC","STSong","Noto Serif CJK SC",serif;--sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","Noto Sans SC","PingFang SC",sans-serif;--mono:"SFMono-Regular","Roboto Mono","Noto Sans Mono CJK SC",monospace}*{box-sizing:border-box}html{background:#fff}body{margin:0;color:var(--ink);background:#fff;font-family:var(--sans);line-height:1.6}a{color:inherit;text-underline-offset:3px;text-decoration-thickness:1px}a:focus-visible,summary:focus-visible{outline:2px solid var(--focus);outline-offset:3px}.skip-link{position:fixed;z-index:4;top:6px;left:8px;padding:8px 10px;color:#000;background:#fff;font:12px var(--mono);transform:translateY(-160%)}.skip-link:focus{transform:none}.topbar{min-height:40px;padding:0 16px;display:flex;align-items:center;gap:10px;color:#c3cbce;background:#050606;font:11px var(--mono);white-space:nowrap;overflow:hidden}.wordmark{color:#fff;font:750 14px var(--sans);text-decoration:none;letter-spacing:.02em}.topbar nav{display:flex;align-items:center;gap:12px;margin-left:auto}.topbar nav a{text-decoration:none}.topbar nav a:hover{color:#fff}.status{color:#d8df5d;font-size:10px}.shell{width:min(100%,1160px);margin:0 auto;padding:32px clamp(18px,4vw,56px) 80px}.reading-layout{display:grid;grid-template-columns:minmax(0,760px) minmax(260px,300px);gap:clamp(36px,6vw,84px);justify-content:center;align-items:start}.kicker{margin:0 0 12px;color:#56656b;font:10px var(--mono);letter-spacing:.06em}h1{margin:0;font:500 clamp(34px,4vw,48px)/1.16 var(--serif);letter-spacing:-.016em;text-wrap:balance}.intro{margin:14px 0 0;color:#4e5a5f;font-size:15px;line-height:1.65}.chapter{margin-top:38px;padding-top:16px;border-top:1px solid var(--line);scroll-margin-top:56px}.chapter h2{margin:0 0 16px;font:500 25px/1.35 var(--serif)}.paragraph{max-width:74ch;margin:0 0 18px;font:16.5px/1.82 var(--serif);overflow-wrap:anywhere}.paragraph details{margin-top:8px;color:var(--muted);font:12px/1.6 var(--sans)}.paragraph details p{margin:7px 0}.rail{position:sticky;top:16px;background:var(--rail);border-top:3px solid var(--ink)}.rail section,.rail details{padding:14px 16px;border-bottom:1px solid var(--line)}.rail h2,.rail summary{margin:0;font:700 13px var(--sans);letter-spacing:.03em}.rail p,.rail li{font-size:12px;line-height:1.58}.rail dl{margin:0}.rail dt{margin-top:10px;color:var(--muted);font:12px var(--sans)}.rail dd{margin:3px 0 0;overflow-wrap:anywhere;font-size:12px}.version-list{margin:0;padding:0;list-style:none}.version-list li{padding:10px 0;border-bottom:1px solid var(--line)}.version-list li:last-child{border-bottom:0}.version-list small{display:block;margin-top:3px;color:var(--muted);font:10px var(--mono)}.neutral{max-width:680px;margin:44px 0;padding:22px 0;border-top:3px solid var(--ink);border-bottom:1px solid var(--line);font:16px/1.75 var(--serif)}.history{max-width:760px}.history h1{margin-bottom:20px}.diff{margin-top:30px}.diff ul{margin:10px 0;padding-left:19px}.diff li{margin:8px 0;font-size:13px;line-height:1.55}.source-list{margin:0;padding:0;list-style:none}.source-list li{padding:10px 0;border-top:1px solid var(--line);overflow-wrap:anywhere}.source-list small{display:block;margin-top:3px;color:var(--muted);font:12px/1.55 var(--sans)}.foot{padding:22px 18px;border-top:1px solid var(--line);color:var(--muted);font:11px/1.6 var(--mono)}@media(max-width:1100px){.shell{padding-top:26px}.reading-layout{grid-template-columns:1fr;gap:38px}.rail{position:static}.topbar{padding:0 12px}.topbar nav a:not(:last-child){display:none}}@media(max-width:520px){.shell{padding:22px 18px 60px}h1{font-size:34px}.chapter h2{font-size:23px}.paragraph{font-size:16.5px;line-height:1.82}.topbar nav{gap:8px}.status{font-size:9px}}

@media(max-width:1100px){.topbar nav a:not(:last-child){display:block}}@media(max-width:520px){.topbar>span{display:none}}

/* M5 Kilwa evidence and responsibility additions. */
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